I am seeing this error in our production servers. There is nothing written to the error or server logs regarding this issue. It writes many times a day.
[SIZE=2]2009-03-17 07:10:30:456 [ISC.0076.0007W] XMLCoder decode invalid data type: com.wm.app.b2b.server.JDBCConnection
good , our production environment server logs also has these error , i try to remove pub.flow:SavePipelineToFile/pub.flow:RestorePipelineFromFile , the error logs has been disappeared.